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-rw-r--r--spiral_matrix4.c66
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diff --git a/spiral_matrix4.c b/spiral_matrix4.c
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+// 2326. Spiral Matrix IV
+#include "leetcode.h"
+
+/*
+ * you are given two integer 'm' and 'n', which represent the dimensions of a
+ * matrix. you are also given the 'head' of a linked list of integers. generate
+ * an 'm * n' matrix that contains the integers in the linked list presented in
+ * spiral order (clockwise) starting from the top left of the matrix. if there
+ * are remaining spaces, fill them with -1. return the generated matrix.
+ */
+
+int **spiralMatrix(int m, int n, struct ListNode *head, int *returnSize,
+ int **returnColumnSizes) {
+ *returnSize = m;
+ *returnColumnSizes = (int *)calloc(m, sizeof(int));
+ int **ans = (int **)calloc(m, sizeof(int *));
+ for (int i = 0; i < m; i++) {
+ (*returnColumnSizes)[i] = n;
+ ans[i] = (int *)calloc(n, sizeof(int));
+ memset(ans[i], -1, n * sizeof(int));
+ }
+ int start_row = 0, start_col = 0, end_row = 0, end_col = 0;
+ while (head) {
+ for (int col = start_col; col < end_col && head; col++) {
+ ans[start_row][col] = head->val;
+ head = head->next;
+ }
+ start_row++;
+ for (int row = start_row; row < end_row && head; row++) {
+ ans[row][end_col - 1] = head->val;
+ head = head->next;
+ }
+ end_col--;
+ if (start_row < end_row) {
+ for (int col = end_col - 1; col >= start_col && head; col--) {
+ ans[end_row - 1][col] = head->val;
+ head = head->next;
+ }
+ end_row--;
+ }
+ if (start_col < end_col) {
+ for (int row = end_row - 1; row >= start_row && head; row--) {
+ ans[row][start_col] = head->val;
+ head = head->next;
+ }
+ start_col++;
+ }
+ }
+ return ans;
+}
+
+int main() {
+ struct ListNode *head = listnode_create(0);
+ head->next = listnode_create(1);
+ head->next->next = listnode_create(2);
+ int returnSize, **returnColumnSizes;
+ int **sm = spiralMatrix(1, 4, head, &returnSize, returnColumnSizes);
+ for (int i = 0; i < returnSize; i++) {
+ for (int j = 0; j < returnColumnSizes[i]; j++)
+ printf("%d ", sm[i][j]);
+ printf("\n");
+ }
+ for (int i = 0; i < returnSize; i++)
+ free(sm[i]);
+ free(sm);
+}